「これが、モノを殺すと言うことだ…！」

It’s not jealousy, as jealousy by definition implies desiring what others have to benefit you, at the cost of their happiness for lacking that which you desire.

It isn’t envy either, as envy causes you to desire what others possess, in much the same way as jealousy, but with the added effect of actively seeking to hurt and bring forth suffering, for others have what you do not and dearly wish for.

No, it’s a much simpler yet convoluted feeling. It is the feeling of yearning for that which others have and take for granted, and not just not bear them any ill will over what you lack, but actively encourage them in its pursuit and feel joyful at their happiness in having it.

How exactly do you call such a feeling? I pride myself in my ample and detailed knowledge of the languages I use most commonly, and yet this particular term eludes me… mayhaps the human mind has yet to devise a specific term for it…